Economic dispatch in a stand-alone system using a combinatorial energy management system

In this paper, a new adaptive combinatorial model control strategy is designed for energy dispatch of a photovoltaic-diesel-battery hybrid of an island grid power system, where the battery is optimised to increase its usage time, considering the increase of the fuel cost. The distinguishing feature of the proposed combinatorial step model is that the constraints of batteries are constructed depending on the load control strategy to describe the batteries' different modes (charging and discharging). Parameters of the battery vary with the load estimation and are estimated by the combinatorial process. In the combinatorial model, the control horizon varies according to the method defined by load control. The process steps of the control strategy are effectively used to obtain the dispatching behaviour for the renewable system while optimally considering various constraints of distributed power generation. Therefore, the system performance of the developed optimal combinatorial scheme is validated through simulation and analysis. The designed combinatorial model reduces the diesel generator (DG) power by more than 73 % of its total energy supply to the load.